Washboard for washing machine



FIG. 1 is a perspective view of a washboard for washing machine, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a cross-sectional view taken along line 8-8 thereof shown in FIG. 6; and,

FIG. 9 is another perspective view thereof in an environment of use.

The broken lines are for environmental purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a washboard for washing machine, as shown and described. 